or derivatives thereof
英
美
- It is applicable to substances or their derivatives which are volatilized under the temperatures employed.
气相色谱法适用于在运用温度下挥发的物质或其衍生物。
- The pesticide products of diketene produced by direct synthesis or biosynthesis were introduced.
介绍了由双乙烯酮直接合成或由其衍生物合成的农药品种。